Screen for the separation of ores.



A. H. KIDNEY. SCREEN FOR THE SEPARATION OF 0112s.

APPLIOA'IION FILED DEC. 11, 19113.

Patented Mar. 16, 1915.

3 SHEETS-SHEET l.

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I A. H. KIDNEY. SCREEN FOR THE SEPARATION OF ORES.

APPLICATION FILED DBG.11, 191s.

Patented Mar. 16, 1915.

8 SHE ETSSHEET 2.

kmeoow A. H. KIDNEY. SCREEN FOR THE SEPARATION 0? 01m.

APPLICATION FILED DEC. 11, 1913- I 1 131316., Patented Mar.16,1915.

3 SHEETS-SHEET 3.

ALFRED H. KIDNEY, OF ORANGE, NEW JERSEY.

SCREEN FOR THE SEPARATION OF GEES.

Specification of Letters Patent.

Patented Mar. 16, 191.5.

Application filed December 11, 1913. Serial No. 805,9?2.

TaaZZ'w/wm it may concern:

Be it known that I,- ALFRED H. KIDNEY, citizen of the United States, residing at Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Screens for the Separation of Ores, of which the following is a specification.

My invention relates to an improvement in screens for the separation of ores, and the object is to provide screens so constructed and arranged that they can be'reversed in the shaking frame at the will of the operator.

During the; screening operation 7 the screens become clogged, and the customary process has been to remove the screens and apply'wire brushes to the reverse side of the screen for removing the material froni the screen. This treatment of the screens is very detrimental. The clogging alone proportionately lessens the screening capacity, and seriously affects the sizing function. To overcome this defect, I have provided a screen which can bereversed, so that the material which has become bound in the meshes of the screen will be removed when the screen is reversed, and by the vibration of the screen during the operation of the machine.

Another object is in the provision of a distributer which is connected to the shahing frame for distributing the material onto the-screen. By this method, the ore is dis-,

tributed easily and gradually onto the screen, and thereby saves the life of the screen and overcomes the serious objection of discharging the ore directly from the ho per onto the screen. 1

' A further object is'in the provision of flexible supporting means for the shaking frame, and the agitating means for imparting a bumping actionto the shaking frame, whereby the shakin frame receives reciprocal movement an counter-radial movements.

The invention consists of still other novel features of construction and combinations of parts which will be hereinafter more fully described and pointed out in the claims.

In the accompanying drawin s: Figure 1 is a to plan view; Fig. 2 is a ongitudinal vertica sectional View. F 3 is a top plan view showing two screen sections connected together; Fig. 4 is a longitudinal vertical is the shaking 'frame.

the frame during sectional view of the screens; Fig. 5 is a transverse vertical sectional I View of the shaking frame on Fig. 6 is a detail view showing the spring plate connected to the head end of the ing frame; Fig. 7 is a vertical sectional view through an end of the machine and movable frame showing the manner of mounting buffer springs; Fig. 8 is a view of one of the brackets for holding the bufler spring in elevation; Fig. 9 is an enlarged detail view showing the manner of mounting an edge of the lip or plate in the side of the screen frame; and Fig. 10 is a transverse vertical sectional view of the shaking frame on the line 10-10 of Fig. 3. l

the line 55 of Fig. 3;-

shak- A represents the sup orting frame, and B he upper end of the frame has a steel plate 1 connected thereto. The lower end of the plate isprovided with slots 2, 2, through which screw threaded hand wheels 3, 3 extend, and which are connected to the frame A for adjustably holding the upper end of the shaking frame. The lower end of the shaking frame is suspended by a similar plate 4, which is connected to a bracket 5 on the frame A. l The plate 1 affords an adjustment for the shaking frame, and changes the inclination of the shaking frame, the head end of the frame being at a higher elevation than the lower end. Springs 6 are located between the forward end of the shaking frame B, and the frame A for forming a buffer for its movement.

The recessed disks 6* are connected to the forward end of the frame B in which an end of the springs 6 are received, the other terminal of the sprin 6 being received in the recessed portion 0 7. These brackets 7 are provided with elon ated slots 7. A screw passes through the lame A and through'the elongated slot 7* of the bracket 7 for fastening the bracket to the frame. When the head of the shaking frame B is moved by the adjustment of the plates 1, it is necessary to change the position of the springs 6 and this can be accomplished by means of the screw 7 and the slots 7 of the brackets 7.

The cam shaft 8 is journaled at the lower end of the frame A, and is provided withthe adjustable brackets A, and then allow -the frame to come back and strike the cam,

producing a bumping action. A drive pulley 10 is connected to the shaft for transmitting motion thereto. The movement of the frame is reciprocal, and this movement produce's a counter-radial movement by reason of the like movements of the plates which is created by the tripping cams at the foot of the frame working against the spring 6, which also provides for impacts in such a manner that free movement of the shaking frame is obtained, and impacts with minimum of friction,.and most highly effective vibratory effect is communicated to the screens, inducing rapid screening action with minimum of mesh clogging. I

The frame B is provided along its longitudinal inner sides with a bead or mold 11, upon which the screens are mounted. Mounted upon the moldings are a plurality of screens or sieves, and each screen is provided with a frame 12, made in two sections,

and interposed betweenthe sections is the screen fabric 13, which is of any desired mesh. Thev screens are preferably made up of different meshes, as for instance, some are made of sixty, eighty, and a hundred mesh, but I do not. wish to be limited to the exact size of mesh, as some ores will require a finer mesh, and others acoarser mesh, and it'is my intention to use the mesh of screen A which will give the most satisfactory results.

- At each end of the screen frame openings 14, 14: are formed on each side of the screen, and connected to the screen fabric 13 at each end are lates 15, 15. The plates are held in place y tension rods 16, and the sections of the frame are connected together by means. of screws 17, 17 for fastening the fabric and plates therebetween. The tension rods 16 are provided for affording the 3 pro ertension of the screens at their ends,

an during some operations it is necessary to use more rods than during others. For instance, I have found three tension rods sufficient in fine screens above sixty, and two rods in screens of sixty mesh and coarser.

a next, and so on throughout a number of 'At the head of the shaking frame Ba transverse recess 18 is formed in which an end of one of the lips or plates 15 is received. As all of the screens are made alike, provision must be made for the head screen and the recess 18 is therefore provided for the reception of the lip or protruding'plate 15. The screens are arranged within the shakin frame B in accordance with the Wishes o the operator, and the fine mesh screen can be located at the head of the shaking frame, 'or at a lower point. v

. The lips or plates15 overlap, that is, the lips of two adjacent sections underlap and overlap, so that there is nointerference or interruption in the screening operation, as the ore will pass from one screen onto the tributer.

screens mounted in the shaking frame. The lips or plates 15 are located or received in V-shaped recesses 18*, at their ends, so that the outer edge of the lips is capable of moving vertically. This flexibility of the lips affords an easy connection between the lips of the adjacent sections, as without this flexible connectionthe jointure of the two adjacent lips would be too rigid.

Connected to the. shaking frame B are hoppers 19 for the reception of material passing through the screens. Should any of the screens become clogged, the operator can remove the clogged screen and reverse it, or change its osition within the frame B. This reversing f ature is very important, as clogged meshes are most effectively cleared by the vibration transmitted to the screens, and the reverse feed pressure. p

The joining of the several screens together so that the ore will pass from one screen to the other, produces a continuous screening field ofvaried meshes, and as each screen is capable of being reversed Without ings or perforations through which the ore may pass onto the head screen. The ore or material will be caused to pass through the openin s by the vibrations and movements of the rame B. The ore is fed from a hopr per 21 to the distributer 20-. The object of the distributer is to overcome the objection of discharging the material directly from the hopper onto the bed screen, which is injurious to the screen fabric. The sieving distributer not only arrests the feed before reaching the screen, but also prevents undue friction of same and distributes the ore in a very gentle manner entirely across .the

screen, which is essential to. full screening,

capacity. v

A sliding plunger 22 is located beneath the hopper 21 for feeding the ore into the distributer 20. The plunger 22 is recipro- ,cated by means of a rod 23, which is connected to the lunger by means of a oke 24.

This rod 23 1s eccentrically and. ad ustably connected to a shaft 25 mounted upon the frame A. A pulley wheel26 is mounted upon the shaft, and a pulley 27 on the shaft 8. A belt 28 connects the pulleys 26 and 27,

whereby motion is transmitted to the shaft 25 upon the rotation of the shaft 8 for causing the plunger to be actuated for discharging the ore from the hopper into the dis- The movement which is transmitted to the screens by the cams 9 is indicated by the dotted lines in Fig. 2, and as the frame is forced against the spring 6, a rebound is obtained, forcing the frame back against the cams, the spring plates 4 and 1 permitting the frame to move longitudinally of the frame A. The vibrations, which will be transmitted to the screen by this action, will cause the ore, as it is discharged from the distributer due to vibrations received by the distributer, to separate upon the various screens and pass into the hopper. The ores which are oversized or too large to pass through the meshes of the screens will pass over the lower ends of the lowermost screen, and into a chute 29. The screen frames each being opened at both ends and on both sides of the screens ermits the oversized ores, and in fact, all of the ores, to pass from one screen to another until the proper mesh is obtained for the ores to pass through.

Of course as the ore passes over the screens, some of the ore will be too large to pass through the screens, and will continue to pass from one screen to another-until the last screen is reached, where the ore will pass from the screen over the lower edge thereof and into the chute 29. v

I claim:

1. The combination with a shaking frame, of a screen frame reversibly mounted within the shaking frame, said shaking frame having openings formed on both sides of the screen and end thereof, so that the large particles which will not pass through the screen may be discharged at the end thereof.

2. The combination with a movable frame, and means .for transmitting a vibratory movement thereto, of a plurality of screens invertibly mounted in said frame, and means 'of a plurality of invertible screen frames mounted in the frame, a distributer connected to the movable frame for distributing the matter to one of the screens, of means for transmitting a vibrating movement to the frame for discharging the material from the distributer onto the screens, and for causing the material to pass through the various screens.

4:- The combination With a frame, of a movable frame, flexible means supporting said movable frame upon the first-named frame, means for imparting vibratory movement to said movable, frame, and invertible screens mounted in the movable frame. I

5. A screen comprising a frame having fabric connected to the walls thereof, said frame provided with openings on both sides of the screens at the ends thereof.

6. The combination with a frame, of a plurality of screen frames, invertibly and interchangeably mounted therein, said screen frames having communication with each other.

7. The combination of a frame with a plurality of screen frames havin screening fabric mounted therein, and exible lips connected at the ends of the screening fabric so that the lips of the adjacent sections will form an overlapping jointure.

In testimony whereof I aflix my signature, in the presence of two Witnesses.

ALFRED H. KIDNEY.

Vwitnesses:

WILLIAM F. RnnPA'rH, HENRY M. KIDNEY. 

